package com.itheima.reggie.filter;

import com.alibaba.fastjson.JSON;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Slf4j
@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
public class LoginCheckFilter implements Filter {
    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request =(HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
//        获取本次请求的url
        String requestUrl = request.getRequestURI();
        String[] urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/common/**",
                "/user/sendMsg",
                "/user/login"

        };

        boolean check = check(urls, requestUrl);
        if(check){
            filterChain.doFilter(request,response);
            return;
        }
        if(request.getSession().getAttribute("employee")!= null) {
            Long empId = (Long) request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(empId);
            filterChain.doFilter(request,response);
            return;
        }
        // 移动端
        if(request.getSession().getAttribute("user")!= null) {
            Long empId = (Long) request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(empId);
            filterChain.doFilter(request,response);
            return;
        }
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;
//        filterChain.doFilter(request,response);
    }

    /**
     * 路径匹配
     * @param requestUrl
     * @return
     */
    public  boolean check(String[] urls,String requestUrl){
        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url, requestUrl);
            if(match){
                return  true;
            }
        }
        return  false;
    }

}
